Geant



(No Model) 2 Sheets-Sheet 1.

BQBSERGBANT. SAW Mm. SET WORKS.

10.283,670. maimed Aug. 21, ma. v

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(No Model.) 2 Sheets-Sheet 2 B. E. SERGEANT.

SAW MILL SET WORKS.

No. 283,670. Patented Augzl, 188s.

WITNESSES i a@ NTOR La/M 13%... f

ATTURNEYS.

elfi? UNTTED STATES PATENT EETCE.

BENJAMIN EVENSVSRGEANT, OF GREENSBOROUGH, NORTH CAROLINA.

SAW'M l LL SET-WO RKS.

SPECIFICATION forming part of Letters Patent No. 283,670, dated 'August21, 1883. Application filed March 17, 1883. (No modcLi To aZZ whom, it77mg concern/f Be it known that I, BENJAMIN EvENs SEE.- GEINT, ofGreensborough, in the county of Guilford and State of Forth Carolina,have invented a new and useful Improvement in Saw-Mills; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming partof this speciication, in which-- Figure 1 is aplan view. Fig. 2isavertical section through theline :U to, Fig. 1, looking in thedirection oi' the arrow. Fig. 3 is avertieal section through the line yy, Fig. 1. Fig. 4 isa vertical section through line e e, Fig. 1.

My invention relates to saw-mills; and it consists in improved means foradjusting the log to the saw, as will be more fully described hereafter.I v

In the drawings, A represents the base or frame timbers of the mill, andB is the traveling carriage, arranged, as usual, upon rollers, andprovided on its under side with a rack or straight gear, g, Fig. 2,meshing intoapinion on a reversible shaft. j

C is the main shaft of the mill, bearing upon one end the circular saw Dand upon the other the drive-pulley E, through' which motion is impartedto the running parts of the mill.

Parallel with the shaft G is arranged the reversible shaft F, bearingthe pinion which meshes with therack on the under side of thelog-carriage, which shaft F receives motion from the shaft Gthrough thefollowing revers ing mechanism: On the reversible shaft F is arranged aloose p ulley, G, which is connected by a belt, G', to a pulley, G2, onthe main shaft C. On the reversible sha-ft F is also arranged a loosewheel, H, having gearteeth on its periphery which engage with apinion,H',

on the same shaft with a cone-pulley, H2,

which, by abelt, H3, is connected to a conepulley, Ht, on the mainshaft. These conepulleys, with belt H3 andthe pinion and gear' wheel HH', serve to impart motion to the reversible shaft F through a clutchfor the purpose of driving the log-carriage forward, and the pulleys andbelt G G G2 impart a reverse movement, to the shaft F through a clutchfor the purpose of driving the log-carriage in the reverse direction.For regulating these movements, a double friction-clutch, I I', isarranged on the shaft F, so as Jto-revolve rigidly with it, but beadjustable longitudinally on the same, which is accomplished by means ofa feather or spline. The two portions of the clutch are madediskfshaped, and have fricytional side faces that are arrangedto engage,

respectively, with one or the other of the two loose wheels, G and H.The two disks of this clutch are connected together by a collar with agroove around it, and in said groove swivels the forked arm J of arock-shaft, Ii, arranged at right angles to shaft F and crossing thesame. By rocking this shalt in one direction one face, I, of the clutchis brought into frictional engagement with the loose WheelV H, and thelog-carriage is driven ahead. By rocking the shaft in the otherdirection communication isbrokeu with wheel H, and the other side of theclutch is brought into frictional engagement with the loose pulley G,driving the log-carriage back. For rocking said shaft, I may employ alever, L, which moves over an arc-shaped bar, L', and is held to itsadjustment by a locking-bolt, which lever has a toethat operates in aforked arm, L2, of the roclnshaft to rock it. Another means foroperating this clutch consists of a crank, M, on the end of therock-shaft, and a long pull-rod, M, whose use will be explained fartheralong.

On the log-carriage are arranged the transverse log-restsB, of whichthere are two near each end, arranged in pairs, and having dovetailsliding blocks B2 135 arranged between p them. These sliding blocks areconnected to the log-beam B3, and they serve to adjust the log-beamlaterally' to throw the log more out to the saw as each board is cutoff. For adjust-ing these sliding blocks, screw-threaded rods M2 M3 aretapped through said blocks, and are swiveled by means of a collar incrosspieces connecting the paired log-rests. Each of thesescrew-threaded rods is provided with a bevel-wheel, a. a', which latterare respect ively iixed on screw-shafts N N at right angles to M M.These screw-shafts N N ter'- minate in crankfhandles b b, which areclosely juxtaposed and of the sameV throw, so that the stem or handleportions of the cranks may be brought into line. The screw-threadedportions of these rods N N carry nuts c c', which laterally to the saw.

It will be seen that the cranlehandles of the duplicate setting devicesare provided with a common sleeve or handle, e. This sleeve not onlyfullls the function of ahandle when it is on one of the crank-stems,`but it is capable of being slipped partly off of one crank-stem andpartly on the other, when brought into line, and thus serves as acoupling to connect the two for an exactly equal revolution and equaland simultaneous adjustment of both ends of the log-beam. Vith thearrangement shown and described the workman is enabled from his positionnear the setting-cranks to manage all of the adjustments of the sawi.e., the setting of the ends of the log-beam separately or together, orthe reversal of the movement of the log-carriage, the long pull-rod Mbeing extended to that point for that purpose.

In connecting the log-beams B3 to the sliding blocks B2 B5 it is notrigidly attached to the same, but is pivoted to each of said blocks, sothat it can be turned into aposition oblique to the line of movementofthe log-carriage, as shown in dotted lines in Fig. l. One end of thelog-beam is fitted over a boss, f, (see Fig. 3,) of the sliding blockB5, and is held thereto in pivotal relation by a screw-bolt.' The otherconnection to the other sliding block, it is obvious, must have someprovision for compensating for the increasedlength which exists betweenthe two sliding blocks when the beam B3 is arranged diagonally, and forthis purpose the sliding block B2 is provided with an undercut cleat orplate, g, which is loosely pivoted to the said sliding block. Then onthe under side of the logbeam is fastened a plate, h, having an undercutslot in the same,

with an opening at the end large enough to permit the cleat g to passthrough and be slipped up into the slot. This form of connection permitsthis end of the beam to turn and l also move endwise to compensate forthe dagonal position.

The saw-guide consists of a frame, O, with a forked projection on oneside, each of the branches of which carries a bearing-pin for the saw,and which frame sits upon a support, P, iixed to main frame A, and uponwhich its position is adjusted laterally by set-screw t' and endwise byset-screwj.

Now, in deining more clearly the scope of my invention in regard to someof its features, I would state that I am aware that the log has beenadjusted on its carriage by means which permit its ends to be separatelyadvanced or moved together with an equal adjustment. I am also awarethat thescrew-rods with bevel gears, pointer, and graduated plate arenot broadly new as a means for adjusting the log.

Having thus Vdescribed my invention, what I claim as new is l. Thecombination, with the sliding blocks of the saw-carriage and the twosets of right angular screw-rods with bevel-gears, of apair of cranks ofequal throw, arranged on the adjacent ends ofthe screw-rods, and anadjustable sleeve or coupling adapted, as described, to slide from onecrank-stem to the other or couple them both, as shown and described.

2. The combination, with asaw-carriage, of a swiveled or pivotedlog-beam arrangedl to be adjusted at right angles to the line of cut, orobliquely thereto, as described. 4

3. The combination ofthe sliding block B2, having a boss, f, the slidingblock B5, having swiveling cleat g, the log-beam B3, pivoted to boss fby a screw-bolt, and having a slotted and undercut plate, h, fittingover cleat g, for a longitudinal adjustment, substantially as shown anddescribed.

BENJAMIN EVENS SERGEANT.

Witnesses:

J. T. WooTERs, W. R. ANnRnWs.

